This document summarizes the findings of a research project that used building information modeling (BIM) on a housing development project. Key findings included: establishing time and cost plans using the BIM model; coordinating models in a common data environment; involving suppliers early to develop BIM objects; and lessons around software compatibility, early engagement of facility managers, and contractors' limited BIM capabilities. The summary concludes that BIM has potential benefits but also presents changes that are needed for its successful adoption, like moving construction to an assembly process.

1. The Employer’s Information Requirements
and the
Role of the BIM Information Manager
Ashley Beighton
Julian Bullen
Worthing Homes, Meadow Rd.
Innovate UK funded research project
A Housing Forum Demonstration Project
&
Constructing Excellence Innovation in Practice
Project
Graham Clarkson, The Clarkson Alliance

2. 1. Background to our research project
2. Objectives of the research project
3. Involving the supply chain
4. Early findings
5. Lessons Learnt
6. Summary
Content

3. Background to Research project

4. • Collaboration Partners
– The Clarkson Alliance
– Clearbox, BIMxtra
– Worthing Homes
• Host project – Meadow Rd
• The project comprises the development of 12 new
build 2 bedroom houses of 77 - 79m2 arranged in three
blocks units
• £1.39m

5. Progress on site – June ‘15

6. Objective
1 Establish how time can be assigned to components and how the installation of each component can be
sequenced to produce a construction programme.
2 Establish how costs can be attributed to components so that a cost plan for the project can be produced
which is accurate to within 2% of the final outturn cost before post-contract change.
3 Establish whether the model can be used to increase off-site manufacture and thereby integrate the
supply chain into the process.
4 Establish how we can monitor the completeness of design.
5 Design in a ‘live’ single environment, without drawings to avoid interfaces.
6 Integrate contract administration processes into BIMXtra.
7 Use the BIM model to simulate the construction and assembly process prior to commencing work on site.
8 Soft Landings – Establish if the model can used for operation and maintenance of the completed facility
and that whole life cycle costs can be recorded in the BIM model.
9 Achieve the following savings on the host project:
10% reduction in design costs
20% reduction in construction costs
75% reduction in post-contract change
10% reduction in time on-site
25% reduction in notified defects
25% reduction in construction waste
10 Establish a re-engineered process and roles and responsibilities across the construction supply chain to
integrate BIM.
11 Publicise findings from research project to achieve future reductions in construction costs.

7. Consultants have created 3D models using various BIM tools and these have been
exported in a variety of file types.
These models have been coordinated and shared in a common data environment,
BIMXtra.
Models
Architectural
Sub-Structure/Civil
Mechanical
Electrical
Timber Structure
Authoring Software
Autodesk Revit
AutoCAD Civil 3D
Autodesk Revit
Autodesk Revit
AutoCAD & Consultec Plugin
Common Data Environment

8. Models can be viewed by all project stakeholders within a visual environment.
Selection can be made of one or multiple models to enable users to interrogate data
pertinent to them.
Various options within the BIMXtra Highlighter allow a user to view data associated to
objects and to view documents that have been linked to objects.

9. Data can be viewed by users who have been assigned task specific users rights within
the cloud based environment.

10. Models have been loaded into the system and objects from these are being organised
into design schedules.
Once this information has been approved and a fixed revision set then O&M
documentation will be uploaded and linked to these objects.

11. Documentation can be view and is directly linked to objects within a visual
environment.

12. Employer’s Information Requirements
PAS11-92:2013 © The British Standards Institution 2013
Sets out asset information for model

13. What do you want to use the
information for?
BIM Project Execution Guide v2.0 The Computer Integrated Construction Research Program, Penn State Department of Architectural Engineering
Key is to 'start with
the end in mind' i.e.
what is the BIM
model for? The use
cases are useful in
defining the various
needs. These use
cases should then
form the basis of
the Employers
Information
Requirements

14. Why do we need the information
- Rainwater goods

15. Common Data Environment (CDE)
• shared use of individually authored models in a
Common Data Environment (CDE), being a single
source of information for any given project, used
to collect, manage and disseminate all relevant
approved project documents for multi-
disciplinary teams.
• The CDE is a critical tool for effective
collaboration, quality control and avoidance of
waste

16. No CDE
No Comment
- deviation
caused waste &
rework

17. Model development
• 1st time data entry and
capture
• Clash avoidance
• Federating the model
• Deviation & Defects
• Asset management
Design
Construction
As built

18. Involving the supply chain
• Early Contractor and supplier involvement
– 2 stage tendering – lessons learnt
– Early sub-contractor, supplier and manufacturer
involvement
– BIM objects
– It’s not just about the supply of components it’s
also the supply of information

19. Early research findings
• Timber frame
– Software compatibility
– Level of detail provided
– All starting from the same base coordinates
• Changing suppliers for cost reasons –
unintended consequences
• Suppliers developing BIM objects for their
product range
• Incorporation of EIR’s in the contract

20. Changing suppliers for cost reasons – unintended consequences
• Need to write EIR’s into contract

21. off-site manufacture
• the equation of cost of component versus
availability of data needs to be considered. It
maybe that it is worth paying more for
something that has the data available. This
will save drawing time (the architects will not
have to model the object themselves) and also
provide access to O & M date that will reduce
maintenance costs

22. Lessons learnt
• BIM involves delivering both a physical building
and a virtual building in the form of a BIM model.
• It’s better to design in BIM from the start: if the
planning submission drawings can be extracted
from a BIM model at scheme design stage then
once planning's been obtained there can be a
more seamless transition into the detailed design
stage, with no need for unnecessary rework.

23. Lessons Learnt
• If there's a need to collect operation and
maintenance information in the BIM model
then early engagement with the asset and/or
facilities managers is key in order to
understand what data needs to be collected
through the design and build process and in
what format so that it can pass seamlessly
into the operation and maintenance phase

24. • for BIM Level 2 it's preferable if designers have already
gone through the process of at least (a) trialling BIM in
house (lonely BIM) and (b) sharing their BIM models on
a one-to-one basis with other designers
• it's important to understand the team's BIM capability
so that any issues or risks arising can be understood
and mitigated. To facilitate this the BIM Capability
Assessment form should be appended to the EIR and
the BEP contain a Project Implementation Plan setting
out how any issues or risks arising will be mitigated.
Lessons Learnt

25. BIM Challenges
• Smaller supply chain contractors undertaking limited
design, currently do not have the BIM capabilities
• Manufacturing software does not easily link with design
authoring software e.g. timber frame required some coding
from software engineers to bring through all the data (but
this was overcome by Clearbox writing some code)
• Lots to learn on "first" projects
• Not used to providing more detailed information earlier
which enables design issues to be resolved. Procurement
needs to be reviewed to engage teams earlier in the
process.
• Not all families of objects available with intelligent data

26. Summary
• BIM has the opportunity to revolutionise our industry
• For any revolution to take place there is a need for us
all to change
• Benefits are significant – 90% reduction in post
contract change
• Improve quality & reduce waste
• Improving buildability
• Moving Construction to an assembly process
• Achieving targets set for 2025 Construction Strategy

27. BIM, It’s a journey and there’s
still a long way to go
Graham Clarkson
The Clarkson Alliance
01865 355 580
graham@theclarksonalliance.com
@tcaprojects